我也偶尔出现楼主的情况
下面是我的黑名单规则
/(?:\.|\/|_|")(?:ads?(?:\d|code|gif|graph|list|log|puba|s?file|sence|site|show)?|(?:ali)?union(?:sky|sys)?|all(?:4ad|yes)|banner|cooperate|corporate|SogouUnion.*|cp(?:c|ro)|(?:guan|my)?gg(?:ao)?|keyrun|p(?:4|f)p|sp(?nsor|code))s?(?:\d)*(?:\.|\/|_)/
/[\W_]ads?(?!=&)(?:banner|click|flow|frame|ima?ge?|log|serv(?:er|e)?|stream|type|view|vert(?:ising|ise?ment)?|trix|xchange|wrapper)?s?[\W\d_]/
/(?:\/|\-|_)(?:\d){2,3}x(?:\d){2,3}[^0-9]+(?:swf|gif|jpg)/
#exd#*.google.*#q=cache###by=theworld&q=cache
#exd#*.btchina.net*#<!-- begin of ad block -->(?:.|\n)*?<!-- end of ad block -->###<!--Ad blocked by TheWorld2-->
#exd#*.btchina.net*#<TD align=center width="20%">(?:.|\n)*?<\/TD>###<!--Ad blocked by TheWorld2-->
#exd#*.sina.*#<div id=PublicRelation[^>]*?>(?:.|\n)*?<\/div>###<!--Ad blocked by TheWorld2-->
#exd#*.sina.*#<!--企业服务文字广告开始-->(?:.|\n)*?<!--正文结束-->###</table><!--Ad blocked by TheWorld2-->
#exd#*.sina.*#<td width="(?:612|640)" valign="top" class="lc_blue">###<td width="100%" valign="top" class="lc_blue">
#exd#*.sina.*#<style[^>]*?type="text/css[^>]*?>(?:.|\n)*?正文左边控制开始(?:.|\n)*?<\/style>###<link rel="stylesheet" type="text/css" id="css" href="http://files.myopera.com/elkay.theworld/filter/sina.css">
#exd#*.sina.*#<DIV[^>]*class="?top_bar"?>[\s\S]*?http:\/\/unipro\.sina\.com\.cn\/[\s\S]*?<\/script>###<DIV class="top_bar"><SCRIPT src="http://nicolliu.googlepages.com/sinatopbar.js"></SCRIPT>